How to retain the values across connections in websocket server? - node.js

Question

Below is the websocket server side code that uses "ws" plugin.
var WebSocketServer = require('ws').Server
,wsSend = new WebSocketServer({port: 8080}) //Client sends message on this port.
,wsReceive = new WebSocketServer({port: 8081}) //Response is sent on this port.
,clientMessage;
wsSend.on('connection', ReceiveSocketConnection);//From client.
//Callback function on connection with client.
function ReceiveSocketConnection(webSocket) {
webSocket.on('message', GetMessageFromClient);
}
//Handler to receive message from client.
function GetMessageFromClient(messageFromClient) {
clientMessage = messageFromClient; //Message from client saved into variable
}
wsReceive.on('connection', SendSocketConnection);//To client.
function SendSocketConnection(webSocket) {
webSocket.send(clientMessage);//Here clientMessage is undefined
}
Below is the client side code.
var WebSocket = require('ws')
, wsSend = new WebSocket('ws://localhost:8080') //send port
, wsReceive = new WebSocket('ws://localhost:8081'); //receive port
//Open connection on send port.
wsSend.on('open', function() {
wsSend.send('Hi I am new to websockets');
});
//Open connection on receive port.
wsReceive.on('open', function() {
//Do nothing
});
//Receive message from server via port 8081
wsReceive.on('message', function(message) {
console.log('received: %s', message);
});
Separate ports for sending and receiving messages are there because it is a design decision.
I want to echo the message by receiving it on one port and sending it on another.
Problem : The message from the client is not saved into the local variable(i.e clientMessage).Any suggestions?

Answer 1

this should work, however i recommend using http://socket.io/
var WebSocketServer = require('ws').Server
,wsSend = new WebSocketServer({port: 8080}) //Client sends message on this port.
,wsReceive = new WebSocketServer({port: 8081}) //Response is sent on this port.
wsReceive.broadcast = function(data) {
for(var i in this.clients)
this.clients[i].send(data);
};
wsSend.on('connection', function(ws) {
ws.on('message', function(message) {
console.log('received: %s', message);
try {
console.log('sending: %s', message);
wsReceive.broadcast(message);
} catch (e) {
console.log(e);
}
});
});